Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6] / fs / xfs / linux-2.6 / xfs_quotaops.c
1 /*
2  * Copyright (c) 2008, Christoph Hellwig
3  * All Rights Reserved.
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License as
7  * published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it would be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write the Free Software Foundation,
16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
17  */
18 #include "xfs.h"
19 #include "xfs_dmapi.h"
20 #include "xfs_sb.h"
21 #include "xfs_inum.h"
22 #include "xfs_ag.h"
23 #include "xfs_mount.h"
24 #include "xfs_quota.h"
25 #include "xfs_log.h"
26 #include "xfs_trans.h"
27 #include "xfs_bmap_btree.h"
28 #include "xfs_inode.h"
29 #include "quota/xfs_qm.h"
30 #include <linux/quota.h>
31
32
33 STATIC int
34 xfs_quota_type(int type)
35 {
36         switch (type) {
37         case USRQUOTA:
38                 return XFS_DQ_USER;
39         case GRPQUOTA:
40                 return XFS_DQ_GROUP;
41         default:
42                 return XFS_DQ_PROJ;
43         }
44 }
45
46 STATIC int
47 xfs_fs_quota_sync(
48         struct super_block      *sb,
49         int                     type)
50 {
51         struct xfs_mount        *mp = XFS_M(sb);
52
53         if (!XFS_IS_QUOTA_RUNNING(mp))
54                 return -ENOSYS;
55         return -xfs_sync_inodes(mp, SYNC_DELWRI);
56 }
57
58 STATIC int
59 xfs_fs_get_xstate(
60         struct super_block      *sb,
61         struct fs_quota_stat    *fqs)
62 {
63         struct xfs_mount        *mp = XFS_M(sb);
64
65         if (!XFS_IS_QUOTA_RUNNING(mp))
66                 return -ENOSYS;
67         return -xfs_qm_scall_getqstat(mp, fqs);
68 }
69
70 STATIC int
71 xfs_fs_set_xstate(
72         struct super_block      *sb,
73         unsigned int            uflags,
74         int                     op)
75 {
76         struct xfs_mount        *mp = XFS_M(sb);
77         unsigned int            flags = 0;
78
79         if (sb->s_flags & MS_RDONLY)
80                 return -EROFS;
81         if (!XFS_IS_QUOTA_RUNNING(mp))
82                 return -ENOSYS;
83         if (!capable(CAP_SYS_ADMIN))
84                 return -EPERM;
85
86         if (uflags & XFS_QUOTA_UDQ_ACCT)
87                 flags |= XFS_UQUOTA_ACCT;
88         if (uflags & XFS_QUOTA_PDQ_ACCT)
89                 flags |= XFS_PQUOTA_ACCT;
90         if (uflags & XFS_QUOTA_GDQ_ACCT)
91                 flags |= XFS_GQUOTA_ACCT;
92         if (uflags & XFS_QUOTA_UDQ_ENFD)
93                 flags |= XFS_UQUOTA_ENFD;
94         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
95                 flags |= XFS_OQUOTA_ENFD;
96
97         switch (op) {
98         case Q_XQUOTAON:
99                 return -xfs_qm_scall_quotaon(mp, flags);
100         case Q_XQUOTAOFF:
101                 if (!XFS_IS_QUOTA_ON(mp))
102                         return -EINVAL;
103                 return -xfs_qm_scall_quotaoff(mp, flags);
104         case Q_XQUOTARM:
105                 if (XFS_IS_QUOTA_ON(mp))
106                         return -EINVAL;
107                 return -xfs_qm_scall_trunc_qfiles(mp, flags);
108         }
109
110         return -EINVAL;
111 }
112
113 STATIC int
114 xfs_fs_get_xquota(
115         struct super_block      *sb,
116         int                     type,
117         qid_t                   id,
118         struct fs_disk_quota    *fdq)
119 {
120         struct xfs_mount        *mp = XFS_M(sb);
121
122         if (!XFS_IS_QUOTA_RUNNING(mp))
123                 return -ENOSYS;
124         if (!XFS_IS_QUOTA_ON(mp))
125                 return -ESRCH;
126
127         return -xfs_qm_scall_getquota(mp, id, xfs_quota_type(type), fdq);
128 }
129
130 STATIC int
131 xfs_fs_set_xquota(
132         struct super_block      *sb,
133         int                     type,
134         qid_t                   id,
135         struct fs_disk_quota    *fdq)
136 {
137         struct xfs_mount        *mp = XFS_M(sb);
138
139         if (sb->s_flags & MS_RDONLY)
140                 return -EROFS;
141         if (!XFS_IS_QUOTA_RUNNING(mp))
142                 return -ENOSYS;
143         if (!XFS_IS_QUOTA_ON(mp))
144                 return -ESRCH;
145         if (!capable(CAP_SYS_ADMIN))
146                 return -EPERM;
147
148         return -xfs_qm_scall_setqlim(mp, id, xfs_quota_type(type), fdq);
149 }
150
151 struct quotactl_ops xfs_quotactl_operations = {
152         .quota_sync             = xfs_fs_quota_sync,
153         .get_xstate             = xfs_fs_get_xstate,
154         .set_xstate             = xfs_fs_set_xstate,
155         .get_xquota             = xfs_fs_get_xquota,
156         .set_xquota             = xfs_fs_set_xquota,
157 };